Exponential beer froth decay – disputed

Arnd Leike of the University of Munich was awarded the 2002 Ig Noble Physics prize for demonstrating that beer froth obeys the mathematical Law of Exponential Decay. [Reference “Demonstration of the Exponential Decay Law Using Beer Froth,” Arnd Leike, European Journal of Physics, vol. 23, January 2002, pp. 21-26.] Since then, investigations into the decay […]

The delicious effect of espresso foam [research study]

Two scientists in Japan studied how the foam on a fresh cup of espresso makes that drink so thermodynamically delicious. My “Improbable Research” column on the RealClearLife web site gives details. It begins: What’s not so hot about hot coffee —no matter how much you love it — is how quickly it cools. Two Japanese scientists noticed […]

Further on the physics of froth

Hard and soft on the heels of the announcement about beer foam’s anti-spillage property comes other news about beer foam research: “Physics of Beer Tapping,” Javier Rodríguez-Rodríguez, Almudena Casado-Chacón, and Daniel Fuster, Physical Review Letters, 113, 214501, 20 November 2014. The authors report: “The popular bar prank known in colloquial English as beer tapping consists in […]

The effect of beer foam on resisting beer spills

Beer foam, as a subject of experimental inquiry, will be on tap at a physics meeting next week: Abstract: H16.00009: “Damping of liquid sloshing by foams: from everyday observations to liquid transport“ 67th Annual Meeting of the APS Division of Fluid Dynamics, Sunday–Tuesday, November 23–25, 2014; San Francisco, California, Session H16: Free-Surface Flows V: General, […]